Car truck construction



May 5, 1931. s. P. BUSH CAR TRUCK CONSTRUCTION 3 Sheets-Sheet 1 FiledJan. 4, 1927 gmwntoz May 5, 1931.

s. P. BUSH CAR TRUCK CONSTRUCTION Filed Jan. 4, 1927 5 Sheets-Sheet 2May 5, 1931. s. BUSH 1,803,791

CAR TRUCK CONSTRUCTION Filed Jan. 4, 1927 5 Sheets-Sheet a 2&6.

31 7-5- 73 f6 f ..l l o I-Z'7-fl gvvuento'o J J aw Patented May 5, 1931UNITED STT'S career rice SAMUEL P. BUSH, OF COLUMBUS, OHIO, ASSIGNOR TOTHE BUCKEYE STEEL CASTINGS COMPANY, OF COLUMBUS, OHIO CAR TRUCKCONSTRUCTION Application filed January 4, 1927. Serial No. 158,95G.

This invention relates to car truck construction and its primary objectis to attain large spring capacity without widening the bolster or thebolster opening. Another ob ect is to provide effectual means forlocking the bolster to the side frame without employing outside bolsterstops, and equalizing the load on the springs while facilitatingdisassembling of the truck to effect wheel changes,or for otherpurposes. These stated objects, and other objects which will appearincidentally 1n the course of the following description, are attained insuch astructure as is illustrated in the accompanying drawings, and theinvention resides in certain novel features which will be particularlypointed outin the appended claims.

In the drawings, Figure 1 is a side elevation of a car truck embodyingthe present invention,

Figure 2 is an enlarged horizontal section on the line 22 ofFig. 1,

Figure 3 is a view showing the side frame in transverse section and thebolster and asso 'iated parts in elevation,

Figure 4 is a section on the line 4-4 of Fig. 3,

Figure 5 is a section on the line 55 of Fig. 4 with some parts inelevation and some parts broken away,

Figure 6 is a detail plan view of the yoke or spring cap,

Figure 7 is a view similar to, Fig. 2 and showing a differentspringarrangement,

Figure 8 is a view in side elevation showing the bolster construction,

Figure 9 is a plan view of the bolster structure, and

Figure 10 is a view of an outer end of the bolster.

The side frame of the car truck comprises an upper compression memberl,a lower tension member 2, and columns 3 integrally connecting thecompression and tension members and defining a bolster-receivingopening. The lower portion of the columns are nearer together than theirupper portions, as shown in Fig. 1, and spring seats 4 are formed nearthe bases of the columns over the lower tension member of the sideframe, the .end of the spring plank 5 being received between the lowerportions of the columns and resting upon the tension member and fillingthe space between the spring seats 4. The end of the spring plankextends somewhat beyond the outer side of the side frame, as shownin'Fig. 3, and upon the side frame are provided brackets or shelves 30to support the parts of the springs which projectover the sides of thespring plank. It will be :noted that the brackets are provided on bothsides of the side frame and at both sides of the spring plank sothatthey also guide the spring plank when assembling the truck, and alsoaidin resisting lateral stresses thereon. The central webs of thecolumns may be made of any suitable form, and are preferably madeconcaveor semi-cylindrical in form, as shown in Figs. 2 and 7, and from theside edges of the columns, arms 6 and 7 project respectively inward andoutward to abut and guide the bolster 8, the end of which extendsthrough the upper part of the opening between the columns. Springs 9 ofthe usual form are disposed below the bolster, and it will be noted thatthere is a spring mount ed on each spring seat 4 and partly housed'bythe corresponding column while other springs may rest partly on thebrackets 30 and partly on the spring plank, the arrangementaccommodating a large group'of springs. In order that the full benefitof the large group of springs may be obtained in supporting the bolster,a yoke or cap 10 is provided between the springs and the bolster, saidyoke or cap consisting of aplate having endsll constructed to projectwithin the upright lines of the columns. The side edges of the yoke maybe straight and parallel through their entire length but they are shownin Fig. 6 as parallel in their middle portions and converging from themiddle portions toward their semi-circular ends, this form affording amore extended support for the bolster while maintaining the ends of theyoke housedin the respective columns. On the basal chords of thesemi-circular ends, upright members 12 rise from the plate or body ofthe yoke to abut the sides of the bolster, as shown in Figure 4, theolster provided will abutments or overhanging lips or flanges 13 to restupon the upper edges of the uprights 12, and bracing ribs 14 beingformed integral with the outer sides of the walls 12 and the endportions of the plate. The bolster is preferably formed with atransverse groove 15 in its under side to receive the plate or body ofthe yoke, and it will now be seen that the yoke is interlocked with thebolster and with the side frame through the columns thereof so thatdisplacement of the bolster relative to the side frame is prevented.Although I have shown the groove construction in the underside of thebolster, it is ob vious that other means to serve the same pur pose maybe employed. It is also to be noted that the outer ends of the lips orflanges 13 form stops to abut the inner edges of the arms 7 on thecolumns and that inner stop lugs 16 are formed on the sides of thebolster to abut the inner edges of the arms 6, while the bolster isreduced in width from and outwardly beyond the vertical plane of theinner side of the yoke. A vertical stop shoulder 17 is thus produced onthe bolster to abut the inner edge of the upright 12 while the outeredge wall abuts the edge of the arm 7. The two side frames of the cartruck are thus effectually held in spaced relation without any outsidestops on the bolster.

In Fig. 2, I have shown an arrangement of six springs and it will benoted that four springs are arranged in the usual four-spring groupformation and that they bear partly against the yoke and partly againstthe bolster while the end springs bear against the ends of the yoke,thus getting the advantages of a six-spring group while the bolster neednot be any wider than is ordinarily the case with a four-spring roup.

It will be observed that the group of springs, as an entirety, extendsin the direction of the length of the side frame with the end springsprojecting partly within the columns and resting on the spring seats 4and the intermediate springs arranged in rectangular relation. Thecorners of the rectangle defined by the intermediate springs projectover the sides of the spring plank and the portions of the springs whichthus project are supported by the brackets 30. It is also to be notedthat the overhanging lips or flanges 13 on the bolster, by bearing onthe upright members of the yoke, transmit a proportional part of theload to the latter and through said members to the end springs whichhave their axes disposed approximately in the vertical planes of saidupright members.

In Fig. 7, I have shown a group of five springs arranged in cruciformrelation, one spring being disposed at the center of the group andbetween the springs which project within the upright lines of thecolumns so that three springs bear upwardly against the yoke and twosprings bear directly against the bolster, one at each side of the yoke.The bolster in this form of the invention may be narrower than in thefirst-described form but is, otherwise, the same, except that it issomewhat elongated, as at 18, to accommodate the outermost spring, thespring plank, of course, being likewise extended.

lVith my improvements, when wheel changes are necessary or, for anyother reason, it is desired to disassemble the truck the bolster isacked up so that the springs which are outside of the longitudinalcenter line of the frame may be removed, and so that suitable blocks maybe placed between the bolster and the spring plank to hold the bolsterabove the interlocking elements of the yoke. Then, if the spring planktogether with remaining bolster springs, yoke and bolster, superposed onthe spring plank, be jacked up so as to be freed from the side frame,the interengaging elements at the journal boxes having been released,the side frame, yoke and springs within the columns may be withdrawnlaterally as one unit leaving the spring plank, i11- side bolstersprings and bolster in their proper relation and not materiallydisturbed. A. reverse procedure will, of course, quickly and easilyreassemble the truck.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is r 1. In a car truck, the combination of asid frame having columns and a bolster opening between the columns, agroup of springs carried by the side frame, some springs projectingwithin the upright lines of the columns and some springs being disposedin the bolster opening, a yoke resting on a portion of the springs andengaged in the columns, and a bolster having an end resting partly onthe springs and partly on the yoke.

2. In a car truck, he combination of a side frame having columns and abolster opening between the columns, a group of springs carried by theside frame, some springs projecting within the upright lines of thecolumns and some springs being disposed in the bolster opening, a yokeresting on a portion of the springs and engaged in the columns, andabolster having an end resting partly on the springs and partly on theyoke and interlocked therewith.

3. In a car truck, the combination of aside frame having columns and abolster opening between the columns, a group of springscar- L ried bythe side frame, some projecting within the upright lines of the columns,a yoke above the springs, and a bolster having an end engaged in thebolster opening of the side frame and resting partly on the yoke directand partly on the springs, the ends of the yoke engaging the columns ofthe side frame and the bolster being provided in its under side withinterlocking means whereby the yoke will lock the bolster to the sideframe.

4. In a car truck, the combination of a side frame, springs carried bythe side frame, a spring seat member above the springs and engaged withthe side frame, portions of certain of said springs hearing at theirupper ends against said member, and a bolster resting partly on saidmember and partly on certain of the springs and interlocking with saidmember, the bolster being provided with stop means abutting the sideframe.

5. In a car truck, a side frame having columns and a bolster openingbetween the columns, bolster guiding arms projecting laterally from thecolumns, springs carried by the side frame, a yoke extending over aportion of the springs and having its ends engaged with the columns ofthe side frame and arranged to abut the inner ends of the outerbolster-guiding arms on the columns, and a bolster having an end restingpartly on the springs and partly on the yoke locked with the latter, thebolster being provided on its sides with stops arranged to abut theinner bolster-guiding arms.

6. In a. car truck, the combination of a side frame, springs carried bythe side frame, a spring seat member above the springs and engaged withsaid frame, said member constituting a bearing for portions of certainof the springs, and a bolster resting partly on certain of the springsand partly on said nember and interlocked with the latter, the bolsterbeing provided with stop means abutting the side frame, and other stopsabutting the ends of said spring seat member.

7. In a car truck the combination of a side frame having columns and abolster opening between the columns, a group of springs carried by theside frame, some springs projecting within the upright lines of thecolumns and some springs being disposed in the bolster opening, a yokeabove the springs and engaged in the columns, a bolster interlocked withthe yoke, the bolster having abutments or flanges on its sidesoverhanging the upright ends of the yoke whereby to transmit part of theload to the ends of the yoke and the springs projecting within thecolumns.

8. In a car truck, a yoke to fit between the bolster and the springs andconsisting of a plate having end portions projecting within the uprightlinesof the columns, seated within and supporting in part the sides ofthe bolster and adapted to provide bearings for the springs.

9. In a car truck, the combination of a side frame having columns and abolster opening between the columns, a group of springs carried by theside frame, some springs projecting within the upright lines of thecolumns and some springs being disposed in the bolster opening, a yokeabove the springs and engaged in the columns, a bolster having an endresting partly on the yoke and partly on the springs and interlockedwith the yoke, the

and inter toaster having abutments or flanges on its sidesoverIiang-ingthe upright ends'of the" yoke whereby to transmit part of the load tothe ends of the yoke and the springspro' jecting withinthe columns." I

10. Ina cartr'uck, a side frame having an upper member, a lower member'and'columns connecting said members, spring seats near the 'basesofthe'colu'mns'over the'lower men her of the side fran'i'e, -brackets on theside frame adjacent the'inner edges of the spring seats, a spring plankresting on the lower member of the side frame between said brackets'andthe lower'portions of the columns, a group of springs" supported by thespring plank, the spring se'atsan'd said brackets, and a bo1ste1--supported by the springs.

11. I'n'a car truck, a bolster having its end portion reduced in widthrelativeto its intermediate portion" and provided near its end withoverhanging lips or a'butments and provided with stop shoulderson itssides at the inner ends of saidlips'and with other stop shoulders spacedinwardly from the first-mentioned shoulders.

12. In a car truck, a yoke arranged between the bolster and the'springsand consisting of a'plate' having end portions adapted to' engage withinthe upright lines of the columns of the truck side frame and uprightmembers spaced inwardly" from the extremities of the end portions.

13. In a'ca r' truck, a yoke to'fit between the bolster and the springsandconsisting of a plat-shaving semi circular ends and walls rising-onthe basal'c'hords of said ends.

14; In a c'ar'tr'uck, a yoke engaged between the bolster andthe springsand adapted to transmit bolst'erflloa'ds partly from the sides of thebolster and partly from the bottom of the bolster,- to'sprin'gs' partlyoutside of the verticalplaneo'f' the sides of the bolster end portion,said yoke having-interlocking con nection with the bolster andcolumns'of' the side frame whereby the frame and bolster areinterlockedin the transverse direction:

15,111" a car truclnthe combination of a side frame comprising tensionand compression members, spring seats supported by the tension member, abolster, springs between the bolster and spring seats, and columnsdefining a bolster opening and extending from the tension member to thecompression member of the side frame, said columns being recessed fromthe lower spring seats upwardly and above the springs and partiallyhousing certain of said springs.

16. In a car truck, the combination ofa side frame comprising tensionand compression members, spring seats supported by the tension member, abolster, springs between the bolster and spring seats, columns defininga bolster opening and extending from the ten sion member to thecompression member of the side frame, said columns being recessed fromthe lower spring seats upwardly and above the springs and partiallyhousing certain of said springs, and an upper spring seat memberintermediate the springs and bolster and entering the recessed columns.

17. In a car truck, the combination of a side frame comprising acompression memher and a tension member having oblique portions,recessed columns connecting said compression and tension members anddefining a bolster opening, a bolster entering said opening, springseats at the lower ends of the recessed columns and above the obliqueportions of the tension member, means affording other spring seatsbetween the first mentioned spring seats and on the same horizon talplane therewith, and springs between said spring seats and the bolster,certain of said springs being partially housed from end to end by saidrecessed columns.

18. In a car truck, the combination of a side frame comprisingcompression and tension members, columns connecting said compression andtension members and defining a bolster opening, sprlng seats at thelower ends of said columns, a bolster entering said bolster openingbetween the columns, springs under the bolster and resting upon saidseats, each of said columns having a contour defined by a channeledcross section extending from said spring seats upwardly and above saidsprings, said springs being partially housed from end to end by saidcolumns.

19. In a car truck, the combination of a side frame comprisingcompression and'tension members, columns connecting said com-- pressionand tension members and defining a bolster opening, each of said columnshaving a contour defined by a channeled cross section, a bolsterentering the bolster opening, said columns provided with parts toprovide bearing surfaces for the bolster, and springs under the bolsterand partially housed from end to end by said columns.

In testimony whereof, I have signed this sbecification.

SAMUEL P. BUSH.

